Creosote-oil substitute and process of making same.



TED TATE EPAETENT QFFKQE,

GEORGE EDWARD HEYL, OF LONDON, ENGLAND.

OREOSOTE-OIL SUBSTITUTE AND PROCESS OF MAKING- SAME.

Patented st. Q, 1917.

1,242 188 Specification of Letters Patent. No Drawing. Application filed February 21, 1917. Serial No. 150,017.

To all whom it may concern:

Be it known that I, GEORGE EDWARD HEYL, subject of the King of Great Britain, residing at Kings House, Kingsway, London, England, have invented new and useful Im provements in creosote-Oil Substitutes and Processes of Making Same, of which the following is a specification.

This invention relates to an improved process for obtaining a substitute for creo sote oil for impregnating or coating-timber and for other purposes Oreosote obtained from coal tar or directly fromcoal, such as light creosote or middle oil distilled from coal tar at 170- 230 (1, and also to a certain extent heavy creosote or creosote oil distilled from coal tar at 230270 (3., has after neutralization of the contained tar acids and removal of the bulk of the naphthalene and naphthalene derivatives by refrigeration, been found to afiord, after or without redistillation, a valuable fuel liquid for internal combustion engines.

However, by the process of tar oil for use as a fuel in internal combustion engines, in some cases as much as of the bulk is abstracted as naphthalene and naphthalene derivatives.

These na hthalene and naphthalene derivatives, a though available in the usual Way as a source of refined naphthalene, are greatly in excess of the demand for 'such purpose, and it is the object of the present invention to provide a use for the extracted naphthalene and naphthalene derivatives.

A use for the naphthalene and naphthalene derivatives is provided according to the present invention, by dissolving the naphthalene and naphtha ene derivatives in mineral oil and employing the solution for impregnating or coating timber, and for other purposes for which ordinary creosote is use for the naphthalene and naphthalene derivatives, but also the deficiency caused bythe diversion of the middle oil andcreosote oil from use as timber preserving liquids,is more or less made good.

Moreover, in circumstances where the creosote oils are imported into a mineral oil producing country, freight will be saved the importation of the naphthalene an preparingthe By this means not only is a use provided naphthalene derivatives only, which are to be dissolved in mineral oil in the importing country. I

The present invention therefore consists in dissolving naphthalene and naphthalene derivatives in mineral oil and in the so-produced product.

As much as equal quantities of naphthalene and naphthalene derivatives and mineral oil will enter into solution one in the other on heating the oil to 80 C.

On cooling, the oil assumes the consistency of salty creosote, and can be used when heated to impregnate or coat timber in the same manner as creosote.

Any mineral oil can be used, such as crude petroleum, unrefined kerosene or the like.

The naphthalene and naphthalene derivatives can be obtained as follows Middle oil. obtained from coal tar is for example neutralized and washed by mixing the oil with 10-30% of caustic alkali, caustic soda for instance, in-an aqueous solution. After separation from such alkaline solut1on the oil is washed with 25-% of sulfuric acid. The oil is then washed with water and decanted off, after which the oil is refrigerated to about or below 0 C. The refrigerated oil is passed through a filter press whereby the naphthalene and naphthalene .clerlvatives are retained in cakes.

' These cakes of naphthalene and naphthalene derivatives after abstraction from the filter press, are subsequently dissolved in mineral'oil as above described either after transit to a region where mineral oil is abundant or at the place where the naphthalene and naphthalene derivatives are produced, or elsewhere, according to circumstances.

The. naphthalene and naphthalene derivatives can also be obtained by allowing the respective tar oil to stand a te tion, Washing and refrigeration until the naphthalene and naphthalene derivatives crystallize out, Whereafter the oil canv be decanted. I

The yield of naphthalene and naphthalene derivatives can be increased by mixing the oil hot or cold with concentrated caustic aflkali, in addition to or instead of the treat- ;ment of the oil with dilute causticalkali'.

Obviously naphthalene and naphthalene r neutralizaderivativesobtained in the usual manner by- I mineral oil, naphthalene the normally occurring se aration out of naphthalene from the coo ed distillate in the distillation of coal tar, can be employed for carrying out the present invention.

I claim: a

1. A process-for obtaining a substitute for creosote oil, consisting in dissolvin in and naphtha ene derivatives obtained from coal tar distillates.

2. A process for obtaining asubstitute for creosote oil, consisting in dissolving in mineral oil, naphthalene and naphthalene derivatives obta ned from the distillate creosote distilledfrom coal tar between 170- for creoso 3. A process for obtaining a substitute for creosote oil, consisting in dissolving in mineral oil, naphthalene and naphthalene derivatives obtained fromflmiddle oil distilled from coal tar between l70-230 C.

4:. A process for obtaining a substitute for creosote oil, consisting in heating mineral oil and in dissolving, in saidheated mineral oil, naphthalene and naphthalene derivatives obtained from coal tar distillates;

I 5;. A process for a for creosote oil, consisting in heating to 80 0. mineral oil and in dissolving in said heated mineral oil an approximately equal quantity of naphthalene and naphthalene derivatives obtained from coal tar distillates. v

6. A "process for obtaining a substitute for creosote oil, consisting in neutralizing creosote distilled from coal tar between l70270 30., refrigerating said neutralized creosote, separating the deposited naphthalene and naphthalene derivatives from said creosote and dissolving said naphthalene and na hthalene derivatives in mineral oil.

A process for obtaining a substitute oil, consisting in neutralizing middle oil=distilled from coal tar between 17 0-230 (1, refrigerating said neutralized middle oil, separatin the deposited naphthalene and napht alene derivatives tilled from coal tar between 170230 obtaining a substitute measles from said middle oil and dissolving said naphthalene and naphthalene derivatives in mineral oil.

8. A process for obtaining a substitute for creosote oil, consisting in mixing with concentrated caustic alkali, creosote distilled from coal tar between 170270 (1.,

refrigerating said creosote, separating the deposited naphthalene and naphthalene de-' rivatives from said creosote and dissolving 11. A substitute for creosote oil, consisting of a solution in an approximately equal quantity of mineral oil, of naphthalene and naphthalene derivatives obtained from coal tar distillates.

12. A substitute for creosote oil, consisting of a solution in mineral oil, of naphthalene and naphthalene derivatives obtained from the distillate creosote distilled from coal tar between 170-270 G.

13. A substitute for creosote oil, consisting of a solution in mineral oil, of naphthalene and naphthalene derivatives obtained from middle oil distilled from coal tar between l70-230 C.

In testimony whereof llhave signed my name to this specification in the presence of two subscribing witnesses.

enoson EDWARD HEYL. Witnesses;

M. MEILOR, Gno. VAN Damn. 

